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Reinforcing of RCS Control Ability by Utilizing Jet Interaction Force

JAXA Supercomputer System Annual Report April 2017-March 2018

Report Number: R17EA1403

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Shigeru Hamamoto, Aeronautical Technology Directorate, Aerodynamics Resuearch Unit
  • Contact Information: Hajime Miki miki.hajime@jaxa.jp
  • Members: Hajime Miki, Yoshiki Takama, Keisuke Fujii

Abstract

A capsule lacks its attitude control ability during a reentry flight. The purpose of this study is to utilize RCS interaction force for reinforcing the ability by changing the external shape locally.

Reference URL

N/A

Reasons for using JSS2

The use of JSS2 was nessesary for conducting CFD analysis to survey the validity of the capsule shape change in a short period before manifucturing a wind tunnel model.

Achievements of the Year

HRV capsule was changed its external shape near the RCS, and CFD analysises using FaSTAR code were performed on that capsule to examine variations of the interaction force. Figure 1 shows pressure distributions on its after-body, and it seems the RCS interaction causes mainly on the shape changed part. As shown in Fig. 2, the interaction force increased in a direction of reinforcing the RCS control ability. The design and manufacuture of wind tunnel model was carried out based on this CFD result.

Annual Reoprt Figures for 2017

Fig.1: Pressure distribution around RCS

 

Annual Reoprt Figures for 2017

Fig.2: Variation of RCS interection force

 

Publications

■ Presentations

1)Miki, H., Fujii. K. "Prediction of Jet Interaction Heating on a Reentry Capsule", SciTech2018, AIAA-2018-0382.

Usage of JSS2

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: N/A
  • Number of Processes: 128
  • Elapsed Time per Case: 20.00 hours

Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.05

 

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
SORA-MA 417,613.89 0.06
SORA-PP 139.20 0.00
SORA-LM 0.00 0.00
SORA-TPP 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 013.70 0.01
/data 1,229.21 0.02
/ltmp 2,669.27 0.20

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.00 0.00

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report April 2017-March 2018


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Location

Chofu Aerospace Center
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